With a large 12-inch coil is unique among gold-detecting metal detectors because it combines high sensitivity to small gold nuggets and multi-functions as a general treasure detector. Target ID-Different types of metals are classified on a scale of 0-100 from left to right along the arc at the top of the screen. Ground balanceGround balance is the ability of the detector to ignore or see through the minerals naturally present on the earth and only make a sound when a metal object is detected. Precise positioning-Precise positioning is the process of finding the exact location of buried objects. Identification-When the detector emits different tones to different types of metals, and when the detector "rejects" certain metals, we call it the detector "identify" different types of metals., Manufacturer: MTHCKXJBSUZ